.layout {
  width: 1200px;
  margin: 100px auto;
  display: flex;
  justify-content: space-around;
  align-items: flex-start;
  ol {
    list-style: none;
    flex: 1;
    margin-left: 50px;
    max-height: 600px;
    overflow-y: auto;
    h4 {
      display: flex;
      .tools {
        min-width: 220px;
        margin-left: auto;
      }
    }
    a {
      text-decoration: none;
      color: #000;
    }
  }
}
